[Objective] One mesoscale system of rainstorm in the warm zone in Nansha area during June 8 and 9 in 2009 was studied.[Method] By dint of routine meteorological observation data,NCEP reanalysis data,FY-2C TBB,and wind...[Objective] One mesoscale system of rainstorm in the warm zone in Nansha area during June 8 and 9 in 2009 was studied.[Method] By dint of routine meteorological observation data,NCEP reanalysis data,FY-2C TBB,and wind line data,etc.,the circulation situation,physics field,and the activity of convection system of mesoscale of one rainstorm in the warm zone of Nansha during June 8 and 9 in 2009 were expounded so as to explore the causes of such rainstorm.[Result] The rainstorm had distinct convection nature,with large precipitation intensity,uneven distribution,and short timeliness.Most precipitation fell in 5 hours.And the rainstorm in the warm zone was directly related to the activity of meso-convective system and was resulted from moderate β scale convection system(Mβcss).The flux field of the high layer of convection layer had fine absorption effect.Coordinating with the southwest and south field at middle and low 500 and 850 hPa in the middle and lower layer to converge around the Zhujiang Delta,it provided unstable condition and humidity for the rainstorm in Nansha area.The advantageous combination of flux in convective layer,vortex and vertical speed field and the sufficient water supply provided dynamic and water vapor guarantee for the generation of rainstorm in the Nansha area.The vertical speed of <-0.3 m/s reflected the beginning of precipitation and the smaller the vertical speed was,the stronger the precipitation intensity became.[Conclusion] It provided reference for the report of rainstorm of such kind in the future.展开更多
目的了解佳木斯市2004-2017年肾综合征出血热(hemorrhagic fever with renal syndrome,HFRS)流行病学特征,评价HFRS疫苗防控效果,并为预防控制提供科学依据。方法对佳木斯市2004-2017年HFRS网络直报资料进行描述性分析,率的比较采用卡...目的了解佳木斯市2004-2017年肾综合征出血热(hemorrhagic fever with renal syndrome,HFRS)流行病学特征,评价HFRS疫苗防控效果,并为预防控制提供科学依据。方法对佳木斯市2004-2017年HFRS网络直报资料进行描述性分析,率的比较采用卡方检验。结果佳木斯市2004-2017年报告HFRS病例5318例,年平均发病率为15.33/10万,不同年份的平均发病率差异有统计学意义(χ^2=1856.94,P<0.05)。HFRS发病具有明显的季节特征;病例主要以青壮年男性为主;职业以农民为主,占69.76%;男女性别比为3.64∶1,男性平均发病率高于女性,差异有统计学意义(χ^2=1617.99,P<0.05);HFRS疫苗接种后发病率逐年下降。结论HFRS防控重点人群为农民,此外,工人、学生、离退休人员、家务等职业人群也应加强防护;疫苗接种对防控HFRS效果明显,建议提高45岁以上人群疫苗接种覆盖率。展开更多
文摘[Objective] One mesoscale system of rainstorm in the warm zone in Nansha area during June 8 and 9 in 2009 was studied.[Method] By dint of routine meteorological observation data,NCEP reanalysis data,FY-2C TBB,and wind line data,etc.,the circulation situation,physics field,and the activity of convection system of mesoscale of one rainstorm in the warm zone of Nansha during June 8 and 9 in 2009 were expounded so as to explore the causes of such rainstorm.[Result] The rainstorm had distinct convection nature,with large precipitation intensity,uneven distribution,and short timeliness.Most precipitation fell in 5 hours.And the rainstorm in the warm zone was directly related to the activity of meso-convective system and was resulted from moderate β scale convection system(Mβcss).The flux field of the high layer of convection layer had fine absorption effect.Coordinating with the southwest and south field at middle and low 500 and 850 hPa in the middle and lower layer to converge around the Zhujiang Delta,it provided unstable condition and humidity for the rainstorm in Nansha area.The advantageous combination of flux in convective layer,vortex and vertical speed field and the sufficient water supply provided dynamic and water vapor guarantee for the generation of rainstorm in the Nansha area.The vertical speed of <-0.3 m/s reflected the beginning of precipitation and the smaller the vertical speed was,the stronger the precipitation intensity became.[Conclusion] It provided reference for the report of rainstorm of such kind in the future.
文摘目的了解佳木斯市2004-2017年肾综合征出血热(hemorrhagic fever with renal syndrome,HFRS)流行病学特征,评价HFRS疫苗防控效果,并为预防控制提供科学依据。方法对佳木斯市2004-2017年HFRS网络直报资料进行描述性分析,率的比较采用卡方检验。结果佳木斯市2004-2017年报告HFRS病例5318例,年平均发病率为15.33/10万,不同年份的平均发病率差异有统计学意义(χ^2=1856.94,P<0.05)。HFRS发病具有明显的季节特征;病例主要以青壮年男性为主;职业以农民为主,占69.76%;男女性别比为3.64∶1,男性平均发病率高于女性,差异有统计学意义(χ^2=1617.99,P<0.05);HFRS疫苗接种后发病率逐年下降。结论HFRS防控重点人群为农民,此外,工人、学生、离退休人员、家务等职业人群也应加强防护;疫苗接种对防控HFRS效果明显,建议提高45岁以上人群疫苗接种覆盖率。
